With proper sun/shade, water and food, you're Shimo will grow!
Adding in weekly maintenance will make it thrive!
If you see any leaves or vegetables that are damage or discolored - in general, it looks unhealthy, just cut it or pinch it off. We don't want all of that amazing sun/water/food energy going to leaves or vegetables that aren't going to survive.
Look for pests or critters as well. Depending on where you live, you'll have different types of pests or critters that can damage your Shimo.
For your tomatoes, watch out for horn worms! If you have one, you will have to physically remove it, before it eats your crop!
For your leafy greens like lettuce, mesclun and mustard greens, watch out for aphids! You can use natural pest control methods like neem oil or peppermint oil for most pests, and it works perfectly for aphids!
For peppers you may experience aphids or worms.
In the near future, I'll be writing a lot more about pest management in a separate blog post, so stay tuned!